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DSLR Settings in warmer weather?
Hi Folks
This is my first full summer trying to image DSOs with a DSLR. Most times I am shooting 5 to 7 minute guided subs at ISO 800 but have noticed a significant increase in noise (and LP) creaping into my images. I can't do anything yet about the LP as I don't have a filter - mini question - are they really worth purchasing?
My main question is: Should I be trying a lower ISO setting eg 640 or 400 for these length exposures, or higher ISOs coupled with shorter exposures? Is there a definitive answer, or is it a matter of experimenting to see what works and then try to reproduce better results on successive nights?
The DSLR I'm using is the Canon 60Da.
Tonight looks like it will be cooler than the last few nights and everything is set up and ready to go, but with work tomorrow I can't afford to pull an all nighter - probably 1AM at the absolute latest.
My target for tonight is NGC 2244, The Rosette Nebula if that helps with your advice.
T.YA.I.A.
Paul
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